In addition, IL-10 might be a cytokine of Th2, and the levels of IL-10 were significantly increased after BLAB treatment compared to the OVA group.It may promotes the humoral immunity of Th2 cells and enhances the immune protection; while IL-10 inhibits IFN-γ expressed in Th1 cells, which can reduce the effect of antigenic immunity, and relieve the symptoms of allergic rhinitis. This evidence concerns the gene IL10 and allergic rhinitis.